good evening. it's great to have you with us here on a saturday night, and we begin with what seems to be a backwards weather picture emerging. record warmth across much of the east. take a look at the map. out west in phoenix, it will be right around freezing. reno, nevada, 9 degrees. back east, pittsburgh will be 66 tomorrow. 30 degrees above normal. columbia, south carolina, nearly 80. and in california tonight, farmers, like this one near fresno, are struggling to save their crops from the cold. standing watch at night. some farmers with fans blowing warm air on their field. meteorologist ginger zee standing by with what's causing this. but first, clayton sandell is in the heartland. >> reporter: overnight, temperatures again fell into the 30s in southern california, farmers are working around the clock to protect multimillion-dollar citrus crops. >> we have a defense system set up for the cold.